﻿using QiHe.CodeLib;
using System;
using System.IO;

namespace lwzlz.Common.ExcelLibrary.BinaryFileFormat
{
    /// <summary>
    /// List of nm Unicode strings, 16-bit string length
    /// </summary>
    public partial class SST : Record
    {
        public SST(Record record) : base(record) { }

        public SST()
        {
            this.Type = RecordType.SST;
            this.StringList = new FastSearchList<String>();
        }

        /// <summary>
        /// Total number of strings in the workbook
        /// </summary>
        public Int32 TotalOccurance;

        /// <summary>
        /// Number of following strings (nm)
        /// </summary>
        public Int32 NumStrings;

        /// <summary>
        /// List of nm Unicode strings, 16-bit string length
        /// </summary>
        public FastSearchList<String> StringList;

        public void decode()
        {
            MemoryStream stream = new MemoryStream(Data);
            BinaryReader reader = new BinaryReader(stream);
            this.TotalOccurance = reader.ReadInt32();
            this.NumStrings = reader.ReadInt32();
            int count = this.NumStrings;
            this.StringList = new FastSearchList<String>(count);
            for (int i = 0; i < count; i++)
            {
                StringList.Add(this.ReadString(reader, 16));
            }
        }

        public void encode()
        {
            MemoryStream stream = new MemoryStream();
            BinaryWriter writer = new BinaryWriter(stream);
            writer.Write(TotalOccurance);
            writer.Write(NumStrings);
            foreach (String stringVar in StringList)
            {
                writer.Write(stringVar);
            }
            this.Data = stream.ToArray();
            this.Size = (UInt16)Data.Length;
            base.Encode();
        }

    }
}
